Generally speaking, if low-grade malignant tumors can be detected early and diagnosed early, active surgery, and integrated radiotherapy after surgery, the 5-year survival rate is higher, and even clinical cure can be achieved. In contrast, if low-grade malignant tumors are detected late, patients with late stage tumors have poor efficacy and lower 5-year survival rate. Low-grade malignant tumors are more differentiated and less malignant, so theoretically, the 5-year survival rate of low-grade malignant tumors after treatment is higher than that of medium and high grade malignant tumors. However, in reality, the treatment effect of tumor is affected by many factors. For early stage cancer, whether it is low malignancy or high malignancy, if the tumor is completely removed through early radical surgery, most patients can survive for more than 5 years, which is clinically known as cure; for low malignancy tumor, if it is found late and the tumor progresses to middle or late stage, lymph node metastasis or distant organ metastasis occurs, even if it is treated through surgery, after surgery, together with chemotherapy, radiotherapy, immunotherapy, targeted therapy and treatment, the tumor can be cured. The 5-year survival rate is still low even if the tumor is treated with surgery, post-surgery with chemotherapy, radiotherapy, immunotherapy, targeted therapy, biological therapy, etc. The possibility of clinical cure is relatively small and can only prolong the life span of the patient. In addition, whether the patient can be treated surgically, whether the patient has done standardized anti-tumor treatment after surgery, the diet and nutrition status after surgery, and the psychological factors of the patient also have an impact on the prognosis.